While filming, Gregory Peck decided to become a cowboy in real life, and he purchased a vast working ranch near Santa Barbara, California, already stocked with six hundred head of prize cattle.
Gregory Peck stated that the movie was written as an attack on McCarthyism, which he strongly opposed.
This film is notable for including a rare serious role for Joe DeRita who, after this film was released, became "Curly Joe" of the Three Stooges.
Mr, Simms the fake hangman is Joe DeRita. After this movie finished filming but before it's release he joined the Three Stooges as Curly Joe. Having role as bad guy he didn't take credit.